“Do as much as you can with a project BEFORE you start investing a lot of money into it. Test your prototype, polish it, get it to as perfect as possible before spending. From there you can start investing in the art, editing, etc., but get it as close to final as you can first – it can save you a lot of future headaches.”
— Isaac Vega

Designing board games with manufacturing in mind—tips for cutting costs without sacrificing gameplay (video):

https://www.youtube.com/watch?v=jF8Pvz_18Rg

Recommendations for board games that game designers should play to learn about mechanics and industry trends (video):

https://www.youtube.com/watch?v=MvUAri5EAbw

How to go from crowdfunding a project to selling it through e-commerce (video):

https://www.youtube.com/watch?v=k6CZw8snoro

Rob Daviau on how to playtest like a pro, receive feedback, iterate, and playtest a whole lot more (video):

https://www.youtube.com/watch?v=Wt5_jrytBTs

The board game designer’s oath: some best practices for doing right by your playtesters and fellow designers (video):

https://www.youtube.com/watch?v=7ekw8FYQUG4

How to receive feedback on your game and handle tricky situations with playtesters without stressing out about it too much (video):

https://www.youtube.com/watch?v=YPgUrMbrudQ

“Keep in mind that every game you create (or try to create) is a learning experience. Know that discarded games are not useless. You will always learn from a failed game. These are the ones that teach you the most. A shelved game is like negative feedback well given, you learn much more than with positive feedback.”
— Roberto Pinheiro